This paper describes the design of a compact levitated superconducting coil for the production of a magnetic dipole field to eventually trap positron-electron plasma. The closed 300 turn coil is to be constructed from Bi-2223 high-Tc superconducting tape, directly cooled on a cryogenic cold head (with thermal contact enhanced using helium gas), and inductively energized with a second superconducting coil mounted on the same cold head. Levitation will be achieved from above using a water-cooled copper coil outside the vacuum chamber and its current will be feedback controlled using vertical position information from a laser ranger.
Toward a compact levitated superconducting dipole for positron-electron plasma confinement
M. R. Stoneking, H. Saitoh, M. Singer, E. V. Stenson, J. Horn-Stanja, T. Sunn Pedersen, S. Nißl, U. Hergenhahn, N. Yanagi, C. Hugenschmidt, M. Dickmann, J. R. Danielson, C. M. Surko; Toward a compact levitated superconducting dipole for positron-electron plasma confinement. AIP Conf. Proc. 23 January 2018; 1928 (1): 020015. https://doi.org/10.1063/1.5021580
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